ChaCha20

E6785

ChaCha20 is a modern stream cipher designed by Daniel J. Bernstein, widely used for its high performance and strong security in protocols like TLS.

AI illustration

How this image was made

AI-generated illustration of ChaCha20

This AI-generated illustration was produced by black-forest-labs/FLUX.2-dev (1024x1024) from a prompt written by openai/gpt-oss-120b from the entity's label + description.

Prompt

Generate an image of ChaCha20 (ChaCha20 is a modern stream cipher designed by Daniel J. Bernstein, widely used for its high performance and strong security in protocols like TLS.)

All labels observed (7)

How this entity was disambiguated

Statements (50)

Predicate Object
instanceOf cryptographic primitive ⓘ
stream cipher ⓘ
symmetric-key algorithm ⓘ
AEADName ChaCha20-Poly1305 ⓘ
linked to: Poly1305
basedOn ChaCha stream cipher family ⓘ
linked to: ChaCha20

Salsa20 ⓘ
blockFunctionSize 512-bit ⓘ
category software-oriented cipher ⓘ
cipherSuiteName TLS_AES_128_CCM_8_SHA256 (variant context) ⓘ
TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256 ⓘ
TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 ⓘ
comparedWith AES-CTR ⓘ
Salsa20 ⓘ
counterSize 32-bit ⓘ
cryptanalysisStatus no practical attacks known on full 20-round cipher as of 2024 ⓘ
designer Daniel J. Bernstein ⓘ
designerAffiliation University of Illinois at Chicago ⓘ
firstPublished 2008 ⓘ
formsAEADWith Poly1305 ⓘ
IANAName CHACHA20-POLY1305 ⓘ
linked to: Poly1305
keySize 256-bit ⓘ
license public domain ⓘ
nonceSize 96-bit ⓘ
property designed for high performance in software ⓘ
does not require hardware acceleration for good performance ⓘ
resistant to cache-timing attacks in typical implementations ⓘ
suitable for mobile devices ⓘ
uses 4x4 matrix state ⓘ
roundCount 20 ⓘ
securityGoal confidentiality ⓘ
securityLevel 128-bit security ⓘ
specifiedWith Poly1305 ⓘ
standardizedIn RFC 7539 ⓘ
RFC 8439 ⓘ
stateSize 16 32-bit words ⓘ
status publicly analyzed ⓘ
widely deployed ⓘ
usedInProtocol Noise protocol framework ⓘ
QUIC ⓘ
SSH ⓘ
TLS 1.2 ⓘ
TLS 1.3 ⓘ
linked to: RFC 8446

WireGuard ⓘ
linked to: IPsec
usesOperation add-rotate-xor (ARX) ⓘ
bitwise XOR ⓘ
bitwise rotation ⓘ
modular addition ⓘ
weakerVariant ChaCha12 ⓘ
ChaCha8 ⓘ
wordSize 32-bit ⓘ

How these facts were elicited

Referenced by (23)

Full triples — surface form annotated when it differs from this entity's canonical label.

TLS → supportsAlgorithmFamily → ChaCha20 ⓘ
ChaCha20 → basedOn → ChaCha stream cipher family ⓘ
linked to: ChaCha20
RC4 → replacedBy → ChaCha20 ⓘ
subject linked to: RC4 stream cipher
Poly1305 → oftenUsedWith → ChaCha20 ⓘ
Poly1305 → combinedConstruction → ChaCha20-Poly1305 ⓘ
linked to: ChaCha20
Poly1305 → combinedAsAEADWith → ChaCha20 ⓘ
Salsa20 → relatedTo → ChaCha20 ⓘ
RFC 7539 → title → ChaCha20 and Poly1305 for IETF Protocols ⓘ
linked to: ChaCha20
RFC 7539 → defines → ChaCha20 ⓘ
RFC 7539 → specifies → ChaCha20 stream cipher ⓘ
linked to: ChaCha20
RFC 8439 → defines → ChaCha20 ⓘ
RFC 8439 → specifies → ChaCha20 stream cipher ⓘ
linked to: ChaCha20
ChaCha → hasVariant → ChaCha20 ⓘ
OpenSSL → supportsAlgorithm → ChaCha20 ⓘ
BoringSSL → supportsAlgorithm → ChaCha20 ⓘ
WireGuard → usesCryptography → ChaCha20 ⓘ
subject linked to: WireGuard VPN protocol
RFC 7539 → title → ChaCha20 and Poly1305 for IETF Protocols ⓘ
subject linked to: Yoav Nir
linked to: ChaCha20
XChaCha20-Poly1305 AEAD construction → basedOn → ChaCha20 stream cipher ⓘ
linked to: ChaCha20
Daniel Julius Bernstein → knownFor → ChaCha stream cipher ⓘ
linked to: ChaCha20
HChaCha20 → basedOn → ChaCha20 core function ⓘ
linked to: ChaCha20
HChaCha20 → usedWith → ChaCha20 stream cipher ⓘ
linked to: ChaCha20